Annotate provides an annotation facility for DocBook documents. It
enables visitors to an online version of a DocBook document to add
comments to any paragraph or chapter of the document. It extends the
DocBook XSL stylesheets, leading to modified HTML output which contains
anchors at those places where annotations can be made. Comments and
notes are stored in a DBMS. A CGI program then merges the HTML document
and the comments to produce the output for the visitor.

AnnotateIt! is an open source electronic response
system targeted at composition instructors and
students. It allows a user to annotate HTML and
provides facilities for group interaction.
Annotations may be either hyperlinked or inline,
depending on the user's preference. It also
features reporting of meta information (annotation
types and counts), predefined annotations,
community annotations, conversion of documents to
HTML for annotation, easy document management, and
an assignments calendar.

Annotatio is an implementation of a client and a
server based on the W3C Annotea protocol. It
allows you to create and share annotations to
various types of documents. Most people can use
this program to save comments to HTML documents,
but it also supports other types of annotations
and XML-like documents. In opposition to the
current implementation of the W3C, Annotatio will
save enhanced information of the annotation's
positioning within the document, which will allow
positing the annotation even if the location or
structure of the original document has changed. In
local mode, it will save all annotations locally,
and in remote mode, it will save the annotations
on a central Annotea-compatible server, such as
Annotatio Server.

Anthracite is a collection of Web mining power
tools combined in an easy-to-use graphical
environment that lets users quickly and seamlessly
extract data from Internet sources, modify it to
suit their needs, and export it to templates or
databases, e.g. for RSS feeds.

With MetaModel, you use a type-safe SQL-like API for querying any datastore. It is a data access framework providing a common interface for exploration and querying of different types of datastores. It isn't a data mapping framework. Instead, it emphasizes abstraction of metadata and the ability to add data sources at runtime, making MetaModel great for generic data processing applications, but less so for applications modeled around a particular domain.

Catalyzer is a powerful and flexible cataloging
system that lets you easily organize and maintain
structured records about almost anything. It gives
you menus, lists, file selectors, buttons, and
many more options to let you set up structures to
make information entry as efficient and reliable
as possible. Operating in server mode, it can
expose catalogs and, optionally, the files they
refer to across the Web.

BOUML is a UML 2 tool box that allows you to
specify and generate code in C++, Java, IDL, and
PHP. BOUML is very fast and doesn't require much
memory to manage several thousands of classes.
BOUML is extensible, and the external tools (named
plug-outs) can be written in C++ or Java, using
BOUML for their definition as any other program.
UML models can be exported to HTML pages,
including PNG or SVG graphics.

The Bio2RDF software is a package which resolves
bio2rdf.org semantic Web identifiers corresponding
to bioinformatics data and knowledge bases into
RDF files which can be consumed by any generic RDF
processor.

COCANWIKI is a full-featured Wiki and content management
system. It has many unique features not found in any other
Wikis including live preview when editing, advanced
navigation (including the ability to follow links in both
directions), PIM/calendar extensions, user permissions,
customisable page layouts, virtual hosting (handling more
than one Wiki per server), search, anti-spam, and email
notifications.